21140513841986 has 32 divisors (see below), whose sum is σ = 39536535991680. Its totient is φ = 8236349337600.

The previous prime is 21140513841961. The next prime is 21140513841991. The reversal of 21140513841986 is 68914831504112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4210370 + ... + 7746498.

It is an arithmetic number, because the mean of its divisors is an integer number (1235516749740).

Almost surely, 2^{21140513841986} is an apocalyptic number.

21140513841986 is a deficient number, since it is larger than the sum of its proper divisors (18396022149694).

21140513841986 is a wasteful number, since it uses less digits than its factorization.

21140513841986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574970.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 21140513841986 in words is "twenty-one trillion, one hundred forty billion, five hundred thirteen million, eight hundred forty-one thousand, nine hundred eighty-six".